/usr/lib/python3/dist-packages/Cryptodome/SelfTest/Cipher/test_ChaCha20.py is in python3-pycryptodome 3.4.7-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 | # ===================================================================
#
# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ===================================================================
import os
import re
import unittest
from binascii import unhexlify, hexlify
from Cryptodome.Util.py3compat import b, tobytes, bchr
from Cryptodome.Util.strxor import strxor_c
from Cryptodome.SelfTest.st_common import list_test_cases
from Cryptodome.Cipher import ChaCha20
class ChaCha20Test(unittest.TestCase):
def test_new_positive(self):
cipher = ChaCha20.new(key=b("0")*32, nonce=b("0")*8)
self.assertEqual(cipher.nonce, b("0") * 8)
def test_new_negative(self):
new = ChaCha20.new
self.assertRaises(TypeError, new)
self.assertRaises(TypeError, new, nonce=b("0"))
self.assertRaises(ValueError, new, nonce=b("0")*8, key=b("0"))
self.assertRaises(ValueError, new, nonce=b("0"), key=b("0")*32)
def test_default_nonce(self):
cipher1 = ChaCha20.new(key=bchr(1) * 32)
cipher2 = ChaCha20.new(key=bchr(1) * 32)
self.assertEqual(len(cipher1.nonce), 8)
self.assertNotEqual(cipher1.nonce, cipher2.nonce)
def test_eiter_encrypt_or_decrypt(self):
"""Verify that a cipher cannot be used for both decrypting and encrypting"""
c1 = ChaCha20.new(key=b("5") * 32, nonce=b("6") * 8)
c1.encrypt(b("8"))
self.assertRaises(TypeError, c1.decrypt, b("9"))
c2 = ChaCha20.new(key=b("5") * 32, nonce=b("6") * 8)
c2.decrypt(b("8"))
self.assertRaises(TypeError, c2.encrypt, b("9"))
def test_round_trip(self):
pt = b("A") * 1024
c1 = ChaCha20.new(key=b("5") * 32, nonce=b("6") * 8)
c2 = ChaCha20.new(key=b("5") * 32, nonce=b("6") * 8)
ct = c1.encrypt(pt)
self.assertEqual(c2.decrypt(ct), pt)
self.assertEqual(c1.encrypt(b("")), b(""))
self.assertEqual(c2.decrypt(b("")), b(""))
def test_streaming(self):
"""Verify that an arbitrary number of bytes can be encrypted/decrypted"""
from Cryptodome.Hash import SHA1
segments = (1, 3, 5, 7, 11, 17, 23)
total = sum(segments)
pt = b("")
while len(pt) < total:
pt += SHA1.new(pt).digest()
cipher1 = ChaCha20.new(key=b("7") * 32, nonce=b("t") * 8)
ct = cipher1.encrypt(pt)
cipher2 = ChaCha20.new(key=b("7") * 32, nonce=b("t") * 8)
cipher3 = ChaCha20.new(key=b("7") * 32, nonce=b("t") * 8)
idx = 0
for segment in segments:
self.assertEqual(cipher2.decrypt(ct[idx:idx+segment]), pt[idx:idx+segment])
self.assertEqual(cipher3.encrypt(pt[idx:idx+segment]), ct[idx:idx+segment])
idx += segment
def test_seek(self):
cipher1 = ChaCha20.new(key=b("9") * 32, nonce=b("e") * 8)
offset = 64 * 900 + 7
pt = b("1") * 64
cipher1.encrypt(b("0") * offset)
ct1 = cipher1.encrypt(pt)
cipher2 = ChaCha20.new(key=b("9") * 32, nonce=b("e") * 8)
cipher2.seek(offset)
ct2 = cipher2.encrypt(pt)
self.assertEqual(ct1, ct2)
def test_seek_tv(self):
# Test Vector #4, A.1 from
# http://tools.ietf.org/html/draft-nir-cfrg-chacha20-poly1305-04
key = bchr(0) + bchr(255) + bchr(0) * 30
nonce = bchr(0) * 8
cipher = ChaCha20.new(key=key, nonce=nonce)
cipher.seek(64 * 2)
expected_key_stream = unhexlify(b(
"72d54dfbf12ec44b362692df94137f32"
"8fea8da73990265ec1bbbea1ae9af0ca"
"13b25aa26cb4a648cb9b9d1be65b2c09"
"24a66c54d545ec1b7374f4872e99f096"
))
ct = cipher.encrypt(bchr(0) * len(expected_key_stream))
self.assertEqual(expected_key_stream, ct)
class ChaCha20_AGL_NIR(unittest.TestCase):
# From http://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-04
# and http://tools.ietf.org/html/draft-nir-cfrg-chacha20-poly1305-04
tv = [
( "00" * 32,
"00" * 8,
"76b8e0ada0f13d90405d6ae55386bd28bdd219b8a08ded1aa836efcc"
"8b770dc7da41597c5157488d7724e03fb8d84a376a43b8f41518a11c"
"c387b669b2ee6586"
"9f07e7be5551387a98ba977c732d080d"
"cb0f29a048e3656912c6533e32ee7aed"
"29b721769ce64e43d57133b074d839d5"
"31ed1f28510afb45ace10a1f4b794d6f"
),
( "00" * 31 + "01",
"00" * 8,
"4540f05a9f1fb296d7736e7b208e3c96eb4fe1834688d2604f450952"
"ed432d41bbe2a0b6ea7566d2a5d1e7e20d42af2c53d792b1c43fea81"
"7e9ad275ae546963"
"3aeb5224ecf849929b9d828db1ced4dd"
"832025e8018b8160b82284f3c949aa5a"
"8eca00bbb4a73bdad192b5c42f73f2fd"
"4e273644c8b36125a64addeb006c13a0"
),
( "00" * 32,
"00" * 7 + "01",
"de9cba7bf3d69ef5e786dc63973f653a0b49e015adbff7134fcb7df1"
"37821031e85a050278a7084527214f73efc7fa5b5277062eb7a0433e"
"445f41e3"
),
( "00" * 32,
"01" + "00" * 7,
"ef3fdfd6c61578fbf5cf35bd3dd33b8009631634d21e42ac33960bd1"
"38e50d32111e4caf237ee53ca8ad6426194a88545ddc497a0b466e7d"
"6bbdb0041b2f586b"
),
( "000102030405060708090a0b0c0d0e0f101112131415161718191a1b"
"1c1d1e1f",
"0001020304050607",
"f798a189f195e66982105ffb640bb7757f579da31602fc93ec01ac56"
"f85ac3c134a4547b733b46413042c9440049176905d3be59ea1c53f1"
"5916155c2be8241a38008b9a26bc35941e2444177c8ade6689de9526"
"4986d95889fb60e84629c9bd9a5acb1cc118be563eb9b3a4a472f82e"
"09a7e778492b562ef7130e88dfe031c79db9d4f7c7a899151b9a4750"
"32b63fc385245fe054e3dd5a97a5f576fe064025d3ce042c566ab2c5"
"07b138db853e3d6959660996546cc9c4a6eafdc777c040d70eaf46f7"
"6dad3979e5c5360c3317166a1c894c94a371876a94df7628fe4eaaf2"
"ccb27d5aaae0ad7ad0f9d4b6ad3b54098746d4524d38407a6deb3ab7"
"8fab78c9"
),
( "00" * 32,
"00" * 7 + "02",
"c2c64d378cd536374ae204b9ef933fcd"
"1a8b2288b3dfa49672ab765b54ee27c7"
"8a970e0e955c14f3a88e741b97c286f7"
"5f8fc299e8148362fa198a39531bed6d"
),
]
def runTest(self):
for (key, nonce, stream) in self.tv:
c = ChaCha20.new(key=unhexlify(b(key)), nonce=unhexlify(b(nonce)))
ct = unhexlify(b(stream))
pt = b("\x00") * len(ct)
self.assertEqual(c.encrypt(pt), ct)
def get_tests(config={}):
tests = []
tests += list_test_cases(ChaCha20Test)
tests.append(ChaCha20_AGL_NIR())
return tests
if __name__ == '__main__':
import unittest
suite = lambda: unittest.TestSuite(get_tests())
unittest.main(defaultTest='suite')
|